In this paper, a simple macro model of n-channel MOSFET with dual workfunction gate (DWFG) structure is proposed. The DWFG MOSFET has higher transconductance and lower drain conductance than conventional MOSFET. Thus analog circuit design using the DWFG MOSFET can improve circuit characteristics. Currently, device models of the DWFG MOSFET are insufficient, so simple series connected two MOSFET model is proposed. In addition, a two stage operational amplifier using the proposed DWFG MOSFET macro model is designed to verify the model.
This paper presents a design and fabrication of 0.5 V two stage operational amplifier. The proposed operational amplifier utilizes body-driven differential input stage and self-cascode current mirror structure. Cadence Virtuoso is used for layout and the layout data is verified by LVS through Mentor Calibre. The proposed two stage operational amplifier is fabricated using 0.13 ㎛ CMOS process and operation at 0.5 V is confirmed. Measured low frequency small signal gain of operational amplifier is 50 ㏈, power consumption is 29 ㎼ and chip area is 75 ㎛ × 90 ㎛.
Nb-embedded Janus WSSe monolayer as a resistive or Schottky gas sensor upon CO, HCHO and C2H3Cl in dry transformers: a first-principles investigation Dan He, Guangming Li, Wen Cao, Hao Cui Physics Letters A.2025; 553: 130669. CrossRef
DFT simulations of Al-doped MoTe
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monolayer as an HCHO and C
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H
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Cl gas sensor for status evaluation of a dry-type reactor in the HVDC converter station
Pei Guo, Chao Xiao, Meng Yao, Yao Liu, Jing Hu, Jian Hu, Tai Li Molecular Physics.2025;[Epub] CrossRef
Fault signature gas sensing by the Ni-dispersed SnS
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monolayer for operation status evaluation of dry-type transformer: a first-principles study
Zhigang Chen, Chaoliang Qi, Xin Chen, YuZhe Bao, Yanan Yang, Fan Zhou Molecular Physics.2025;[Epub] CrossRef
Single Ni Atom-Dispersed WSe2 Monolayer for Sensing Typical Fault Gases in Dry-Type Transformers: A First-Principles Study Yan Liu, Jianben Liu, Zhuo Wei, Tian Yuan, Hao Cui ACS Omega.2023; 8(49): 47067. CrossRef
Implementation of Prediction Program for Deterioration Judgment on Substation Power Systems in Urban Railway Ho-Sung Jung, Young Park, Hyun-Il Kang The Transactions of The Korean Institute of Electrical Engineers.2013; 62(6): 881. CrossRef
Analysis of Leakage Current Waveforms for Transmission Line Porcelain Insulators due to ESDD Contamination Jae-Jun Park The Transactions of The Korean Institute of Electrical Engineers.2012; 61(10): 1461. CrossRef
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